Lock



April 9, 1935. J. w. I OVATT 1,997,528

LOCK Filed oct. 5, 1954 2 sheets-sheet 1 j'/jl. J

f ATTORNEY April 9, 1935. J. w. LOVATT I LOCK Filed Oct. 5, 1954 2 Sheets-Sheet 2 WITNESSES: idf/.W0

UNITED'STATES-:PATE

'through Figure 4 on Figure 6 is a sectional viewl through Figure 4 on the line 6-5g 1 I Patented Apr; 9, 1935 LOCK` i John l Wiuiani navate emerson, N. 1J.

Application october 5, 1934,seria1ivo. 747,oo`6. i

This

used in various presents an thesame time substantially seals itself against the entrance of water or Another object of the provide aA lock which isV particularly adapted'to sidewalk doors and the likegthe structure including a keywhich actsjn the double capacity of a k'ey and as a handlelfor the doorfwhen `the ,keyv

is `in use.

y An additional object of the invention is to provide a lock which may bereadily set to present different combinations, with a'key for actuating the lock formed according to a particularVconfi` bination, there being an independent key or keyheadforeach combinaton.`

`A still further object, -more s pecically,` is lto provide` a lock for sidewalk doors andthe like,

whereinasuitable locking mechanism is pro-v vided which will include'a reciprocating plunger positionedso that it maybe moved out `of the Way before the key canfunction, thepar'tsbeing soarranged that-the plunger will automatically move back into has been removed, and invits normal position Vpresent a sealing plug for sealing thekeyhole or `the like.V

against the entrance of waterpsnow In the accompanying drawings-"-` Figure 1 is 4a `fragmentary top 'planview of.' af` sidewalk door with i the door having a lock embodying theinvention part ofthe sidewalk shown,

applied thereto;

Figure 2 is a sectional view through Figure 1 on the line 2 2, thesame being on an enlarged scale; `I Figure 3 is `a sectional view through Figure 1` on 4the line 3-`-3, the` same being on arrenlarged` scale;

f 1 Figure 4' a view ofthe locking mechanism` as illustrated in Figure 3` butwith a key inserted unlocking Vthe mechanism;

ready to be turnedfor I Figure 5 is a fragmentary sectional View the line 5 5; i

I Figure '7 is a top plan view of the `lock easing shown in Figure 4, the locking extensions or bolts being broken away;

Figure 8 is aplan view of` one of the combinai tion discs `shown in` Figure 4;

, i Y l* 7 claims.` (C1. 7o `14)` invention relates'to locks which may be places as, for instance, on vertical `orhorizlontal doors, but adapted particularly for use yon substantially horizontal doors-used las `-sidewall \:-doors, the structure being such that it effective locking mechanism, and `at other foreign matter.` present invention is to its formerposition when the keyV Figure 9 is a top plan view ofa second locking disclshown in Figure 4,'` 1 1 Figure" 10`is` a view similarto Figure: 5V but'y showing a slightl modified structure` wherein lugsextending from he casingare used instead ofpins; "i I,

Figure l1 is a fragmentary bottom plan view of a' manhole cover and surrounding parts, the same being shownin connectionwith a slightly modied embodiment'fof the invention to that shown in liiflllel."l

NTEOFFICE .Y

forinof` Referring tothe accompanying drawings by numerals, I- indicates a pavement or othervsurface, and `2 and 3` indicatepavement or sidewalk'v stiffening bar,and* door 2overlapsthis bar so that when door' 2 is locked closed door 3 ywill likewise be locked otherwise rigidly securedA to the'frame a which actsto support doors Zand 3, said bar 8 really P presentinga lug'on which the bolts or extensions IIJ and II` may ftlso as to lock the door 2 against opening. Extensions I`0 and II are merely inte-` gralprojection's ofthe lock casing' ing is provided ing and guiding aspring I4 with a bore I5 hav-` ing -groovedportions I6 `for the reception of a reciprocating orr slide'block I1.' part of the casingl2 as shown in Fig. `3, bore I5 isenlarged and presents a shoulder |`87for the I 2, rwhich cas` withI a central pin I3 for receivclosed. "Aba'r 8 is welded vor Near the upper reception of the various locking discs or plates I9 and20. "Ihe detailed structure of these plates isshownin Figs. Sand 9, disc `or plate I9 being `stationaryand disc or Vplate ZUbeing movable. It 3 will be evident that any desired number ofthese i plates could be usedaccordingjto the size of the A, auxiliary bore 2| and the thickness of the plates.

' of the stationary I plates `and alsoas many of the movable-plates. 5 ,The plates ZDact in conjunctionwith the key to swing the extensions or Thereare usually twoor more rotate the.. casing I2 and bolts llI and II. into and out of locking position,

while the` plates 1S permit the parts to be rearranged tochange the combinationand also act cutout portions 22 and 23 and an opening 24 centrally through which the slide block [I1 is adapted to move. The apertures 25 and 26 are also provided so thatthe respective pins 21 and n 2S .may project therethrough and hold the plates l against rotation.

` receive the block I1.

are provided with notches 32 and 33 for the revused and instead of through a ring 4I These pins also project through the slots .29 andv 3S of the various plates I9. Plates ISB are also provided with a central opening 3l of thersame shape as the opening '24 so as to In addition, the plates i9 ception of the flanges 34 and 35 depending from the face plate 36. a central portion31 fitting the ap'erture3ilin` the door 2, and with an annular flange SSeXtending beneath the vdoor 2 so as to receive the bolts or rivets 4t whereby the parts are iirmly clamped in place.Vv In addition the .bolts or rivets 40 extend which lis provided with an anthe reception of the flange 43. I2 is firmly; clamped in nular cutout i2 for Inthis way the casing place but is allowed to rotate when the key 44 isl noted that the key 44 is handle 45 merging into functioning. It will be provided with a grip or a shank 45 which has secured thereto Va removable keyhead 41. held in place by suitable set screws 48. The keyhead 41 is adapted for the particular combination shown in the accompanying drawings, but if the combination was changed it would be necessary head. By Arearranging the various plates the combination may be changed quite afew times without adding or subtracting from the number of plates, and foreachv combination it would be necessary to supply a new keyhead. In this way it is possible to make all the locks identical in construction and yet set the combination so that only the particular keyhead could be used. In

this way a number of the locks may be used alongr the same street or in a group and yet each lock will require an independent keyhead.

When the key is functioning and has been pushed inwardly to the position shown in Fig. 4 and then rotated, it cannot be removed and may act as a handle for swinging the door 2 back and forth. This characteristic also necessitates the locking of the lock mechanism before the key can be removed and,' consequently, when the door is closed it can never be left accidentally unlocked provided the key is removed. `When the key is removed the slide block or plunger I1 quickly movesupwardly to the position shown in Fig. 3 so as to present a smooth surface and also a substantially waterproof joint'so that water or other objectionable matter cannot enter into the various parts of the lock. l If desired the lock could be constructed and used as shown in Figs. -1` to 4, inclusive, or it could be used as shown in Fig. 11. This is a fragmentary bottom-view of could be applied toa manhole as shown in Fig. 2 but instead of` using the extensions Ill-and II as locking bolts, aperturesare provided in these ex`- tensions for the reception of pins 49 and 50 which pins extend through n and act as locking bolts, said rods slidingly extending through the sleeves 53 and 54 to the man-` 'sitionv In` this Way the manhole may be readily Face plate 365 is provided with.

, a conductor 62r which is to provide a different keya manhole. The lock` the thrust rods 5I and 52` without the use of picks or by an unauthorized person and at the same time presenting a key which acts as a'handle whereby the cover may be readily removed. l

As shown particularly in Fig. l0 the plate 2U is the pins 21 and 28 there are` provided lugs 21 and v28 which project into the cutaway parts 22 and 23.

Aside from this con- Y struction theY parts are identical and function as illustrated in Figs. land 5.

lAs shown particularly in Figs. 3 and 4 an alarm device is carried by the casing I2 and is adapted to be caused to function by plunger or sliding block I1. there is provided insulating sleeve also connected to the terminals by a bell or other alarm device 63. Awire 34 connects one terminal of the source of current 55, and the source of current is connected by wire 66 to binding post 61, whereby wire 36 is grounded on the casing I2. A hand operated switch 68 is interposed in wire 3S so that when an authorized persondesires to actuate the lock, switch S8 is moved to lfA lock of the character described, includingV a rotatable casing, a face plate provided with an opening arranged against said casing, means for,

holding the. face plate stationary while the ca.,-

ing rotates, the casing havinglocking members extending therefrom, a plunger mounted on said casing, a spring for normally holding said plunger so that the upper end will normally close the opening in said face plate, a plurality Vof ward platesA "casing near the endadjacentv said face plate, all of said plates having notches,

arranged` in said means depending from `said face plate and held stationary thereby extending into the notches of all of said plates,- a 'pin extending from 'said cas-v ing Athrough all oi said plates, certain of lsaid of bell 63 to one side the actuation of the It vwill be noted that a rcontact screw Sli carried by an. 5I and to this screw is connected plates having an aperture slightly larger than said i pin for receiving the pingothers of said plates having arc-shaped slots appreciably longer than the pin is thick, whereby as the key is insertedY into the casing and said plunger is depressed,v said key may engage and turn certain of said therewith while the remainplates and the casing ing plates remain stationary.`

2. A lock of the character described, including a stationary face plate having an aperture arranged substantially centrally thereof, and having a pair of depending prongs, a casing having a small bore merging into a large bore, said casing being positioned so that said prongs will'project into said large bore, a ring connected with said cassaid face plate and interlocking with part of said ing for holding the casing in contact with face plate but allowing rotary movement of the casing with respect to saidface plate, means extending from the casing actingas a locking member, a plunger formed substantially the shape of the small bore in the casing, saidplunger being arranged in said casing, a springfacting on the bottom of said casing and on the plunger for` normally holding the plunger so'that one end thereof will fill the opening in said face plate, and a plurality of ward plates arrangedin said large e bore, all of said plates having cutaway portions the rounded apertures casing, the plates having the arc-shaped slots bean apertured face `for receivingsaid depending prongs, certain of said plates having arc-shaped slots and others of .said plates having rounded apertures, and a pin carried by said casing extending through each of said apertures and through the respective slots, whereby when a key is forced into the casing and depresses said plungerthe operating parts of the keymay engage and rotate the plates having and thereby rotate said ing held stationary by said prongs. e `3. A lock of the character described, including plate, a rotatable casing having a locking member projectingtherefrom, means for rotatably `clamping said casing to said face plate, a plunger arranged in said casing, a spring acting on the plunger for :normally holding one end thereof sothat it will ill the aperture inesaid face plate, a plurality of Ward plates arranged in said casing, and means for holding some of said plates stationary in respect to the casing and for holding others stationary `in respect to said face plate. l e

4. A lock of the character described, formed with a rotatable casing, ward plates arranged in the casing, each of said ward plates having a centrally positioned irregularly shaped aperture extending therethrough, a spring-pressedreciprocating plunger normally extending through the apertures in said plates and at one end extendf platesV so `that ing into the casing beyond said the ward plates cannot be rotated independently of the casing, means for holding certain of said ward plates continually against rotationand other of said ward plates stationary` in respect to said casing, and a locking bolt extending from the casing and actuated thereby. l

5. A lock of the character described, including a casing provided with means acting as a locking bolt, a face plate arranged at one end of` said casing, said face plate having an opening in line with the central part of said casing, a

spring pressed plunger arranged in the casing,

`socket merging into jmovable ward plates e ward plates are rotatedsaid casing will be. ro-

y-7. Ina lockof `certain of said ward 3 said plunger having one end normally lling said opening, and key actuated means carried by the casing and stationary in respect` to the casing, said key actuated means transmitting movement from a key when used to said `casing `for movin said casing through an arc of a circle. l

6.'A lock of thecharacter described, comprising a rotatable rcasing having at one end a Ward chamber and at the remaining part a plunger socketirregularly-shaped in cross section, said the ward chamber, a locking Afrom fsaid casing and moved member extending thereby into and out of [locking position, a plunger slidably mounted in `said socket, spring means for moving saidplunger so'that part thereof will extend into said ward chamber and normally remain in saidward chamber, supporting means for said casing formed with" a dependingmember extending into said Ward chamber, a plurality of stationary ward plates positioned in said ward "Chamberland held stationary by said depending member, a pluralityof movable wardfplates ar` ranged in said wardchamber, and means eX-` tending from said casing projecting through said whereby when said movable tated, all'of said ward platesl having "apertures arranged centrally thereof and of a shape to permit said plunger toslide therethrough.

the character described; aface plate havingan aperture, a plunger having an upper endof a size to fit into and ll said aperture so that the upper'` surface of the face plate will be substantially smooth` and uninterrupted throughout, a casing rotatably supported adjacent said faceplate, said: casing having a ward plate `chamber and a plunger` socket of sufficient length to receive said plunger, aspring posi--l tioned in said socket vand acting to normally hold said plunger with the upper end in the aperture in said face plate, a plurality of `ward plates ar-` ranged in said chamber, each of said Ahaving an aperture which are stationary in respect a key to engage and rotate` plunger is lling the aperi 

